Improvement in grinding-miils



UNITED STATES PATENT OFFICE.

GEORGE HIBSHEE, OF LANCASTER, NEW YORK.

IMPROVEMENT IN GRINDlNG-MILLS.

Specification forming part of Letters Patent No. 151,025, dated May 19, 1874; application filed March 25, 1874.

To all whom it may concern:

Be it known that I, GEORGE HrBsHER, of Lancaster, Erie county, State of New York, have invented a Double Flour-Mill, of which the following is a specification:

My invention relates to improvements in flour-mills, the nature of which is hereinafter fully explained by reference to the following description `and the accompanying drawings, which form part of this specification.

Figure l represents my improved mill in a front elevation, parts` being shown in section. Fig. 2 is a vertical section, showing the mode of hanging the upper adjustable stone F. Fig. 3, Plate 2, is a plan of my improved mill, illustrating the arrangement of the upper horizontal and adjustable stone F for preventing the same from revolving.

A is a horizontal runner. It is provided with a bail and driver of the usual construction, and revolved by means of shaft C and pulley D. It is sharpened on both its faces. E is the fixed bed-stone, and of the usual construction and adjustment. F is the upper movable and adjustable stone. It is sharpened 011 its lower face and provided with a band, G, shrunk on, or otherwise fastened to F. Said band G is provided with two prongs or studs, H H, and serve, in connection with guides O O and connecting-rods K K, the purpose of preventing' the upper stone from revolving. rL is the base. lt has on its upper edge a flange, M, upon which the jacket N is fastened. N is the jacket. It is provided with guides O O, and also with two dischargepipes, X and X. l) is a horizontal carrierbeam. It has its bearing within bracket P', and is raised and lowered by means of setscrew E and screw and hand-wheel V. P is also provided with two grooves, wherein is resting the swing-beam Q bymeans of tongues fastened'` to Q. Q is a swing-beam, resting and swinging upon carrier P, its action being exactly that of a scale-beam, and is provided on its extremities with two connecting-rods, K, thus connecting swingbar Q with band G. S S are two hoppers and feed-pipes, one placed within the other and reaching down one upon the upper and the other upon the lower face of runner A. They are adjustable for the purpose of `controlling theV feed by means of lever '.Il and adjusting-screw U. X X are two discharges- X for the lower side of A, and X( for the upper side of the same.

It will be observed that the adjustable horizontal stone F is adjusted vertically by means of the scale-beam arrangement of carrier l), swing-beam Q, connecting-rods K, band G, and adjusting-screw V, and that by the same means a universaljoint motion is imparted to the horizontal adjustable stone F. This has been done in order to keep the upper horizontal stone F always in contact with runner A, although the same may be of uneven thickness, or may be raised on one side or the other by the introduction of solid substances between either runner A and fixed bed-stone .E or adjustable stone F.

The vertical adjustment 0f runner A is obtained by known means, and need, therefore, not be described.

Be it also observed that by the introduction of the collar B, fastened either to runner A or jacket N, the receiver for the ground substances is divided into two compartments, and that, therefore, different substances may be ground on the faces of runner A, and that X will discharge the contents of the lower, and X those of the upper, compartment; or that the saine substances may be ground on either faces of ruimer A with or without the collar B.

By the arrangement of one horizontal runn ner in combination with a fixed and an adjust-` able bed-stone, only one driving-gearing is employed, and therefore a great saving in Y cost, room, and ruiming expense is produced.

Havingthus fully described my invention, so as to enable any one skilled in the art to which my invention appertains to make and use the same, I desire to secure by Letters Patent the following:

l. rlhe combination,with the stone F, of the band G, connecting-rods K K, swing-beam Q, carrier P, and adjusting-screws R andV, when constructed and arranged to operate substantially as and for the purpose described.

2. In combination with a horizontal runner,

A, and upper and lower horizontal bed-stones,

E and F, the double hoppers and feed-pipes S and S', when placed one within the other, and serving the purpose of feeding both sides of runner A, respectively, substantially as described.

GEORGE HIBSHER. Vitnesses:

MICHAEL J. STARK, JOHN B. EnMoNDs. 

